fix(cli): kamel uninstall should delete kamelets #2479

[tadayosi]

Fix #2479

Release Note

`kamel uninstall` now also cleans up all kamelets defined in the same namespace.

[lburgazzoli]

@nicolaferraro @tadayosi wonder if we should delete all the kamelets or only those that have been installed as part of the operator installation as the user may have installed its own set of kamelets that I guess, should not be deleted as part of the uninstall process

[tadayosi]

@lburgazzoli FYI this pull req also introduces --skip-kamelets option. Maybe we can activate the option by default or introduce another option --skip-user-kamelets with true by default.

[tadayosi]

Reconsidering it, now I think it's better for kamel uninstall to keep user-defined kamelets untouched whether or not --skip-kamelets is enabled, rather than erasing them altogether as Luca suggests. Users can manage your own set of kamelets with kamel kamelet subcommands.